Lead Mobile Engineer (Contractor)

Hauler Hero; United States; Remote; USD 83,000 - 165,000; Full time

Benefits offered by this job

Remote work with US-hours overlap

Job summary

Hauler Hero is seeking a senior mobile engineer to own the mobile engineering stack for an Android app and a new iOS app, with initial focus on iPad workflows for field operations. This hands-on contractor role includes evaluating Kotlin Multiplatform, tightening offline reliability, and setting architecture standards across platforms.

You will design the iOS architecture, contribute to the Android app, and mentor teammates while collaborating with backend, product, design, and QA in a

Qualifications

• 8+ years in software engineering.
• Strong mobile engineering judgment across iOS and Android.
• Ability to build reliable offline workflows with data persistence and sync.

Responsibilities

• Assess Kotlin Multiplatform for sharing business logic; lead recommendation.
• Design and build the first iOS app focusing on iPad workflows; review Android app.
• Improve offline-first behavior with local storage, sync, and robust uploads under weak connectivity.
• Build mobile experiences with maps, location, and in-app navigation.
• Set cross-platform engineering standards via architecture guidance, code reviews, and mentorship.
• Collaborate with backend, product, design, and QA; communicate decisions in a distributed team.

Skills

Kotlin Multiplatform

iOS development (Swift)

Android development (Kotlin/Java)

Tools

Firebase

Maps APIs

Job description

Role overview

Take senior technical ownership of mobile engineering across an existing Android app and a new iOS app, initially aimed at iPads used in field operations. This hands‑on contractor role includes deciding whether Kotlin Multiplatform is a good fit, strengthening offline reliability, and setting architecture and engineering standards across both platforms.

Responsibilities

• Assess Kotlin Multiplatform for sharing business logic between Android and iOS, then lead and communicate a clear recommendation.
• Design and build the first iOS application, with an initial focus on iPad workflows, while contributing to and reviewing the existing Kotlin Android app.
• Improve offline‑first behavior through local data storage, background synchronization, conflict handling, and dependable photo capture and upload under weak connectivity.
• Build mobile experiences involving maps, location, and in‑app navigation.
• Set cross‑platform engineering standards through architecture guidance, code reviews, and mentorship.
• Work closely with backend, product, design, and QA partners, communicating decisions clearly in a distributed environment.

Requirements

• Senior or staff‑level experience, with at least eight years in software engineering.
• Strong mobile engineering judgment and experience shaping architecture across iOS and Android.
• Ability to build reliable offline workflows, including data persistence and synchronization in challenging network conditions.
• Strong written and verbal English communication, with an async‑friendly approach and consistent overlap with U.S. working hours.
• Comfortable owning technical decisions, handling ambiguity, mentoring others, and weighing new technologies against practical needs.

Nice to have

• Production Android experience, Firebase or Firestore, camera or photo capture, or on‑device vision and machine learning.
• Background in logistics, field service, or business software.

Benefits and work setup

This is a contractor engagement, not full‑time employment. It is remote for candidates in Eastern Europe or Latin America, with regular overlap with U.S. working hours required.